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ANSWER:

A. 9/2

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Answer:

18 ARGON, AR 1s22s22p63s23p6 = [Ar] (2.8.8)

EXPLANATION:

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ANSWER:

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ANSWER:

TRUE

Explanation:

Explanation:

Benzene is a planar molecule having delocalized the plane of the ring. HENCE, it is electron-rich.

as a RESULT, it is highly attractive to El ctron-deficient SPECIES i.e.., electrophiles.

VOLUME of solution REQUIRED= 0.05 ml => 0.05/1000 litres => 0.00005 litres

molarity = 0.5 M

let number of moles of H2C2O4 required be x.

molarity = (moles of solute)/itres of solution

0.5=x/0.00005

x= 0.000025 moles of Oxalic ACID

Molar mass of H2C2O4 = 2X1 + 2X12 + 4X16 => 90 grams per mole.

So, mass of H2C2O4 required = 90 X 0.000025 => 0.00225 grams

So, 0.00225 grams of anhydrous oxalic acid will be required.

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Answer:

The molar mass PCl

3

is 137.33 g/mol

The molar mass CL

2

is 70.6 g/mol

INITIAL molar mass 2× initial vapour density

=2×104.16=208.32g/mol

Final molar mass =2× final vapour density

=2×62=124g/mol

Let out of 1 MOLE of PCl

5

present initially, X mole dissociates to form x mole of PCl

3

and x mole of Cl

2

The molar mass of final mixture =124=

1−x+x+x

208.32(1−x)+137.33x+70.6x

124=

1+x

208.32(1−x)+(137.33+70.6)x

124=

1+x

208.32(1−x+x)

124=

1+x

208.32

1+x=

124

208.32

=1.68

x=1.68−1=0.68

The degree of dissociation of PCl

5

at 230

∘

C is

1

0.68

=0.68 or 68 %.

Explanation:

68/

Explanation:

An atom is the PART of an element. A particular element is composed of only one TYPE of atom. Atoms are further composed of SUBATOMIC particles CALLED electrons, protons and neutrons. ELEMENTS can combine with each other to form molecules via chemical reaction.

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B no.is VARIABLE VALENCIES of NI METAL

Answer:

Large parts of the northern lowland of Asia are MARSHY because these are drained by three RIVERS, YENISEI, Ob and Lena. Further, the presence of several lakes has also made itswampy and marshy

Explanation:

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An atom is the part of an element. A PARTICULAR element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, PROTONS and neutrons. Elements can COMBINE with each other to form molecules via CHEMICAL reaction.

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Answer:

TYPES of COMPLEXOMETRIC titration

The standard chelating agent solution is added to the metal ion solution until the end POINT is detected. In this method, metal ion is added to the SUITABLE buffer solution and appropriate INDICATOR solution and the resulting solution is titrated with the EDTA solution.

Explanation:

When chlorine is passed over SLAKED lime, Ca(OH)2, it is rapidly absorbed, forming bleaching powder, or CHLORIDE of lime. The reaction is: Ca(OH)2+ Cl2= CAOCL2+ H2O.

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Answer:

AUTOMOTIVE AIR BAGS inflate when sodium azide, NaN3, rapidly decomposed into N2 and NA by the following reaction: 2 NaN3 --> 2 Na + 3 N2

ANSWER:

MOLAR MASS of OXALIC ACID is 90.03g/mol

ANSWER:

ISOTOPE is defined as that have same atomic NUMBER but different mass number

Answer:

The shielding EFFECT explains why valence-shell electrons are more easily removed from the ATOM. The effect ALSO explains atomic size. The more shielding, the further the valence shell can spread out and the bigger ATOMS will be. The effective nuclear charge is the net positive charge experienced by valence electrons.

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Answer:

The simplest types of chemical formulae are called empirical formulas, which use letters and NUMBERS INDICATING the numerical proportions of atoms of each type. Molecular formulae INDICATE the simple numbers of each type of ATOM in a MOLECULE, with no information on structure.

C6H5NC + 3KCL + 3H2O

Phenyl ISOCYANIDE

Answer:

Carbon is the only element that can form so many different COMPOUNDS because each carbon atom can form four CHEMICAL bonds to other atoms and because the carbon atom is just the right, small SIZE to fit in comfortably as parts of very large molecules. This property is called the CATENATION.

Answer:

In the electrolysis of copper SULPHATE with copper electrodes, when the cations reach the cathode, each Cu2+ is able to REMOVE electrons to acquire a neutral charge and is deposited on the electrode. At the same time, the anions MOVE towards the anode and release their electrons to BECOME a SO4 radical.

Answer:

Copper will react with oxygen to form EITHER brick red CUPROUS oxide (copper(I) oxide, with 63.5 g of copper for 8 g of oxygen) or BLACK cupric oxide (copper(II) oxide, with 32.7 g of copper for 8 g of oxygen), and so has two equivalent weights.

Answer:

C. 3H1 +1 H1 --- 3H 1 + 1p1

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ANSWER:

Multiply the element's ATOMIC number by the number of atoms of this TYPE (see Step 1) in the molecule. Repeat for all elements in the molecule, then add up all the products to calculate the number of electrons.

Explanation:

In the first example, the number of electrons in KNO3 equals (19 x 1) + (7 x 1) + (8 x 3) = 50

Explanation:

As we KNOW,

ΔT

B

=

M

2

W

1

1000K

b

w

2

T

b

−T

b

∘

=

60×100

1000×0.52×0.6

T

b

−373=0.052

T

b

=373.052

Answer:

PLEASE securing the WAY AMAZING commited to cancel

Explanation:

CITRIC acid HELPS PRECIPITATION of iron with AMMONIA by forming a complex with it the Thioglycolic acid helps OXIDES iron 2 to iron 3

13.37 lbs

is the WEIGHT of COPPER OXIDE

Answer:

traditionally a women is. supposed to be CONFINED in the four walls of a room. she should be a good mother and a wife. she should teach her CHILDREN PROPERLY , do the household chores efficiently . she is supposed to create an environment for her male partner to THINK more about the upliftment of the family economically .

Answer:

Generally speaking, we say that light travels in WAVES, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters PER second through a VACUUM. ... We call this the "speed of light"; nothing can move FASTER than the speed of light.

Explanation:

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ANSWER:

Gases used for refrigeration are not very HARMFUL. Are mainly halogenated compounds of methane (CH4). They are LESS toxic and less flammable than other COMMON gases that are not halogen like methane, ethane, or PROPANE that can do the same thing.

ANSWER:

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I

don't

know

Answer:

I have a few questions I WOULD like to ask for a quick answer and a few questions REGARDING your WORK and what I NEED to know for the most POPULAR web

Answer:

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■ Estimation of sulphur :-

A known mass of organic compound is heated with sodium peroxide or fuming nitric acid in a Carius tube. If sulphur is PRESENT it is oxidised to sulphuric acid. The acid is precipitated as barium sulphate by adding excess of barium chloride aqueous SOLUTION. The PRECIPITATE is filtered, washed, dried and weighed.

■ Estimation of PHOSPHORUS :-

A known mass of organic compound is heated with fumic nitric acid in Carius tube. Phosphorus is oxidised to phosphoric acid. The acid is precipitated as ammonium phosphomolybdate by adding ammonia and ammonium molybdate solutions.

Sometimes, the Phosphoric acid is precipitated by adding magnesia MIXTURE. A precipitate of magnesium ammonium phosphate is formed which on ignition gives magnesium pyrophosphate .

FOLLOWING is the ATOMIC STRUCTURE.

Answer:

BRAND:- It means stamping a product with a particular NAME or sign in order to DIFFERENTIATE it from other products in the market. Two reasons why building brand is central ADVERTISING:

(i) It creates a positive image of the product in the eyes of the consumer and compel them to buy it.

(ii) It differentiates the product from the local or other COMPETITIVE products in the market

Answer:

The alkanes are SATURATED HYDROCARBONS—that is, hydrocarbons that contain only single BONDS. Alkenes contain one or more carbon-carbon double bonds. Alkynes contain one or more carbon-carbon triple bonds.

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Answer:

Explanation:

The FORMULA for ALKENE is CₙH₂ₙ. So if it has two carbon ATOMS,

The formula would be C₂H₄

If if has 4  hydrogen MOLECULES, it should have double bond between them.

Otherwise it wont be a covalent bond

ANSWER:

ORGANIC COMPOUNDS are comprised of carbon, HYDROGEN, oxygen, nitrogen, phosphorus, SULPHUR and halogens. 

The average atomic mass (SOMETIMES called atomic weight) of an element is the weighted average mass of the atoms in a NATURALLY occurring sample of the element. Average MASSES are GENERALLY expressed in UNIFIED atomic mass units (u), where 1 u is equal to exactly one-twelfth the mass of a neutral atom of carbon-12.

ANSWER:

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Answer:

Federalism is a system of GOVERNMENT in which the power is DIVIDED between a CENTRAL authority and various constituent UNITS of the COUNTRY. Usually, a federation has two levels of government. One is the government for the entire country that is usually responsible for a few subjects of common national interest.

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The HIGHER the density of the gas the higher the MOLAR MASS and vice VERSA.

Answer:

if atomic MASS of Mg is 24. find out the volume of H2 collected at STP when 12g of Mg REACT WITHS acid to FORM Mgso4.

Answer:

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Explanation:

PRIMARY alcohols and ALDEHYDES are NORMALLY OXIDIZED to carboxylic acids using potassium dichromate(VI) solution in the presence of dilute sulfuric acid. During the reaction, the potassium dichromate(VI) solution turns from orange to green.

decomposition reaction is a type of chemical reaction in which a single compound breaks down into TWO or more ELEMENTS or new compounds. These reactions often INVOLVE an ENERGY source such as heat, light, or electricity that breaks apart the BONDS of compounds.

Answer:

Sand + Sulphur + Iodine (SOLID mixture) on heating in evacuated chamber with inverted FUNNEL deposits iodine as SUBLIME solid. Next dissolve the mixture in CS2 liquid which dissolves sulphur leaving sand as solid residue. On filtration, sand REMAINS on filter paper leaving solution.

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ANSWER:

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